US20020165294A1 - Luminescent coating - Google Patents

Luminescent coating Download PDF

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Publication number
US20020165294A1
US20020165294A1 US09/958,189 US95818902A US2002165294A1 US 20020165294 A1 US20020165294 A1 US 20020165294A1 US 95818902 A US95818902 A US 95818902A US 2002165294 A1 US2002165294 A1 US 2002165294A1
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US
United States
Prior art keywords
coating
luminescent
paint
image
damage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US09/958,189
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English (en)
Inventor
William Cooper
Howard Jess
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LUMINOUS TECHNOLOGIES Ltd
LUMINOUS TECHNOLOGIES LTD0
Original Assignee
LUMINOUS TECHNOLOGIES LTD0
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LUMINOUS TECHNOLOGIES LTD0 filed Critical LUMINOUS TECHNOLOGIES LTD0
Assigned to LUMINOUS TECHNOLOGIES LTD0 reassignment LUMINOUS TECHNOLOGIES LTD0 ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JESS, HOWARD MITCHELL, COOPER, WILLIAM ROBERT
Publication of US20020165294A1 publication Critical patent/US20020165294A1/en
Priority to US11/370,226 priority Critical patent/US20070042139A1/en
Assigned to LUMINOUS TECHNOLOGIES LTD. reassignment LUMINOUS TECHNOLOGIES LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COOPER, WILLIAM ROBERT, JESS, HOWARD MITCHELL
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/8422—Investigating thin films, e.g. matrix isolation method
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/22—Luminous paints
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
    • G01B11/0658—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating with measurement of emissivity or reradiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/645—Specially adapted constructive features of fluorimeters
    • G01N21/6456—Spatial resolved fluorescence measurements; Imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/645—Specially adapted constructive features of fluorimeters
    • G01N21/6456—Spatial resolved fluorescence measurements; Imaging
    • G01N2021/646—Detecting fluorescent inhomogeneities at a position, e.g. for detecting defects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/8422—Investigating thin films, e.g. matrix isolation method
    • G01N2021/8427—Coatings

Definitions

  • the present invention relates to a coating such as a paint, to a method of detecting the quality of the coating and also the use of the coating to detect subsequent damage or deterioration to the coating.
  • Japanese Patent Publication No 02024366 (Application No 63175950) assigned to Dainippon and Shinroihi describes using a zinc-rich coating material with a fluorescent pigment to detect imperfections.
  • the problem with this fluorescent additive is that fluorescent pigments dissolve into the coating so that unless there is a sufficiently high level of pigment, the pigment could Well be quenched by the colouring pigment and furthermore, the Fluorescent pigment, when it is sufficient to be useful, in turn tends to alter the colour of the coating. Either way, this is an undesirable situation.
  • Japanese Publication 11061115 (Lonseal Corp) also discloses the use of fluorescent pigments within coating compositions which can emit bright visible light on UC irradiation but this has the same disadvantages as those exhibited by JP 02024366.
  • a further Japanese Patent Publication JP 11158420 again uses fluorescent pigments with the above disadvantages and where the fluorescent pigments are at a very high level of up to 50% to produce the necessary luminous effect. Such a high level would be undesirable for the present purposes because of the effect on the colour of the coating.
  • British Patent Publication No GB 2,133,701 A discloses the use of fluorescent pigments in coatings for golf balls. Again, the fluorescent pigment tends to alter the colour coating and this is admitted by the applicant Sumitomo Rubber Industries Limited. Generally, the fluorescent pigments appear to be limited to using zinc-based fluorescent pigments. Luminescent pigments differ from fluorescent pigments in not being absorbed within the coating and as a result, perform better in the dark where fluorescent pigments are generally ineffective without a high level of irradiation.
  • the invention provides a coating comprising a paint, preferably an epoxy based paint into which is mixed a luminescent pigment additive less than 10% and preferably less than 1% by weight.
  • Luminescent paints as such normally have greater than 30% of luminescent pigments introduced and typically the level of luminescent pigment is as much as 45% by weight.
  • Spanish Patent No 538468 (ES 008601283) to J and J C Sanchez describes a luminescent paint of this kind where the luminescent pigment is 30 to 65% by weight.
  • the coating of the invention can by no means be classifiable as a luminescent paint.
  • the coating of the invention comprising a paint, may be oil based rather than the preferred epoxy base.
  • a method of detecting the quality of the application or the coating according to the first aspect of the invention comprising applying the coating of the first aspect of the invention to a clean surface, illuminating the coating with ultraviolet light and viewing the luminescent image so produced for gaps and/or variations in the intensity of the luminescence of the image.
  • the ultraviolet illumination of the coating provided in the second aspect of the invention should firstly be carried out during the initial application of the coating since this assists the applicator in identifying and covering any area he has missed, and also to increase to the correct level the thickness of the coating where thinness is identified by the ultraviolet illumination.
  • the illumination provided by the second aspect of the invention should secondly be carried out by the inspectors of the coating to similarly identify areas of missing coverage of the coating, thin areas in the coating, damage to the coating, etc.
  • the Image of the coating so illuminated with ultraviolet light as provided by the second aspect of the invention should in a preferred example be digitally recorded by a suitable camcorder device as permanent evidence for surveys and for subsequent checking of the coating for damage or deterioration.
  • digitally recorded records can be readily stored for long periods, easily moved from construction point to head offices and used as evidence of completion of construction or maintenance contracts, and later used as comparison with later surveys of the same structure to determine areas or extent of coating damage, erosion or deterioration.
  • the recording apparatus should be calibrated either before or after recording the luminescent image. Calibration may be made either by viewing an uncoated surface or by viewing a coating of paint lacking the luminescent pigment additive.
  • the method of the invention has been further discovered to indicate damage to aerospace vehicles, particularly those used for high velocity defense purposes where bird strikes or similar damage occurs to a surface coating of the coating of the invention.
  • the method and coating of the invention has also been discovered to reveal damage to coatings resulting from welding or other sources of heat affecting opposite side of the metal from the coating.
  • the method and coating of the Invention will be useful in applying and Inspecting coatings on metal or other surfaces in a wide range of situations, including any type of tank or storage compartment where a high degree of integrity of the coating (internal or external), is necessary. Examples would include chemical tanks, reaction vessels, ships ballast tanks, rail tank cars, and many others.
  • the coating and method of the invention is also useful in applying and removing shop primer paints applied to steel shapes and plates used in heavy construction. Such initial protective coatings must be completely removed before the final coatings are applied and such complete removal can be facilitated and checked by use of the invention.
  • the coating and method of the invention also functions underwater so long as the illuminating ultraviolet light and recording apparatus are suitably waterproofed.
  • the invention is thus useful for coating and inspecting such underwater structures as pipelines, bridge supports and offshore oil installations of all types. It will also function as a cost efficient means of checking the rate and amount of erosion of the antifouling coatings on the bottoms of ships' hulls without drydocking the vessel.
  • FIG. 1 is a diagram of a coating quality detecting: method according to the invention.
  • a proprietary paint suitable for the application in this case a marine grade epoxy based paint, has added to it luminescent pigment (an optically active additive—OAA) in a proportion by weight of less than 10% and preferably lees than 1% of the epoxy based paint.
  • OOA optically active additive
  • Ballast tank surface 2 is then illuminated by ultraviolet (UV) light at 360 nm from projector 4 Fixed at a known distance from surface 2 .
  • a digital camera 3 with a fixed optical meter 5 is fixed at a known distance from surface 2 .
  • the UV sensitive meter 5 is then calibrated to “zero coatings”. Zero coating is deemed to be indexed to 100 .
  • a second non-luminescent coating can be applied over coating 5 and the same monitoring technique can be used to detect pin holes or holidays showing up brightly through the second coating.
US09/958,189 2000-10-03 2001-03-16 Luminescent coating Abandoned US20020165294A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/370,226 US20070042139A1 (en) 2000-10-03 2006-03-06 Luminescent coating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0024164.6 2000-10-03
GB0024164A GB2367826B (en) 2000-10-03 2000-10-03 Luminescent paint

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US22345805A Continuation-In-Part 2000-10-03 2005-09-09

Publications (1)

Publication Number Publication Date
US20020165294A1 true US20020165294A1 (en) 2002-11-07

Family

ID=9900568

Family Applications (2)

Application Number Title Priority Date Filing Date
US09/958,189 Abandoned US20020165294A1 (en) 2000-10-03 2001-03-16 Luminescent coating
US11/370,226 Abandoned US20070042139A1 (en) 2000-10-03 2006-03-06 Luminescent coating

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/370,226 Abandoned US20070042139A1 (en) 2000-10-03 2006-03-06 Luminescent coating

Country Status (14)

Country Link
US (2) US20020165294A1 (no)
EP (1) EP1326931B1 (no)
JP (1) JP4879450B2 (no)
KR (1) KR100734536B1 (no)
CN (1) CN1233757C (no)
AT (1) ATE467663T1 (no)
AU (1) AU2001240859A1 (no)
DE (1) DE60142118D1 (no)
DK (1) DK1326931T3 (no)
GB (1) GB2367826B (no)
HK (1) HK1062183A1 (no)
NO (1) NO329788B1 (no)
PT (1) PT1326931E (no)
WO (1) WO2002028973A1 (no)

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US20050218321A1 (en) * 2004-04-05 2005-10-06 Karl-Heinz Drenker Method for marking sites
US20120104319A1 (en) * 2009-04-01 2012-05-03 David Postma Luminescent paints and methods of making the same
WO2014118154A1 (de) * 2013-01-30 2014-08-07 Balluff Gmbh Prüfverfahren und prüfvorrichtung für oberflächen
JP2016001146A (ja) * 2014-06-12 2016-01-07 東日本電信電話株式会社 塗装膜の良否判定方法および塗装膜の耐衝撃性能判定方法
JP2017224620A (ja) * 2012-01-03 2017-12-21 ダークサイド サイエンティフィック， エルエルシーＤａｒｋｓｉｄｅ Ｓｃｉｅｎｔｉｆｉｃ， ＬＬＣ エレクトロルミネッセンスデバイス、およびその製造
RU2645431C1 (ru) * 2016-12-02 2018-02-21 Федеральное государственное унитарное предприятие "Центральный аэрогидродинамический институт имени профессора Н.Е. Жуковского" (ФГУП "ЦАГИ") Способ обнаружения ударных повреждений конструкции
DE102019132585A1 (de) * 2019-12-02 2021-06-02 Schaeffler Technologies AG & Co. KG Prüfsystem zur optischen Oberflächenprüfung eines Prüfkörpers
US11287162B2 (en) 2018-01-25 2022-03-29 GlowShop, LLC Solar power system using luminescent paint
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WO2013044229A1 (en) * 2011-09-23 2013-03-28 Lucas Milhaupt, Inc. Luminescent braze preforms
US9696139B2 (en) * 2012-06-25 2017-07-04 The Boeing Company System and method for improved visual detection of protective coatings
MX349327B (es) * 2013-03-15 2017-07-21 Aegion Coating Services Llc Aparato de inspección de la superficie exterior de una tubería.
CN104267001B (zh) * 2014-09-12 2017-06-06 江苏德威涂料有限公司 环氧底漆托油性快速测试方法
EP3181644B1 (fr) * 2015-12-17 2018-06-20 Airbus (Sas) Revêtement de contrôle de l'intégrité interne d'une structure véhicule le comportant
US10562209B2 (en) * 2016-02-04 2020-02-18 The Aerospace Corporation Deposition assembly and methods for depositing mold release layers on substrates
CN106809340B (zh) * 2017-01-13 2018-06-22 宁波大学 船舶船底水下3d扫描修船装置及其修船方法
FR3062059B1 (fr) * 2017-01-26 2020-08-28 Laboratoires M&L Base de formulation cosmetique concentree description
RU2768903C2 (ru) * 2017-07-28 2022-03-25 Пирелли Тайр С.П.А. Способ и устройство для наложения шумопонижающих элементов на шины для колес транспортных средств
GB2576722B (en) 2018-08-28 2021-05-05 Luminous Tech Ltd Phosphorescent coating and inspection method
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FR3102247B1 (fr) * 2019-10-17 2022-07-22 Safran Aircraft Engines Procédé de détermination d’un défaut dans un revêtement recouvrant une pièce d’un aéronef et pièce d’aéronef recouverte de couches de revêtement
CN110779930A (zh) * 2019-10-28 2020-02-11 深圳市华星光电技术有限公司 真空机台内发光材料废料量检测装置
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7126119B2 (en) 2004-04-05 2006-10-24 Bayer Chemicals Ag Method for marking sites
US20070057181A1 (en) * 2004-04-05 2007-03-15 Karl-Heinz Drenker Method for marking sites
US7309862B2 (en) 2004-04-05 2007-12-18 Lanxess Deutschland Gmbh Method for marking sites
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US20120104319A1 (en) * 2009-04-01 2012-05-03 David Postma Luminescent paints and methods of making the same
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KR100734536B1 (ko) 2007-07-04
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JP2004510966A (ja) 2004-04-08
PT1326931E (pt) 2010-08-09
US20070042139A1 (en) 2007-02-22
ATE467663T1 (de) 2010-05-15
NO329788B1 (no) 2010-12-20
EP1326931A1 (en) 2003-07-16
DE60142118D1 (de) 2010-06-24
HK1062183A1 (en) 2004-10-21
JP4879450B2 (ja) 2012-02-22
WO2002028973A1 (en) 2002-04-11
GB2367826B (en) 2003-07-16
EP1326931B1 (en) 2010-05-12
CN1233757C (zh) 2005-12-28
GB2367826A (en) 2002-04-17
GB0024164D0 (en) 2000-11-15
NO20031502D0 (no) 2003-04-02
KR20030042000A (ko) 2003-05-27
CN1468290A (zh) 2004-01-14

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